. >> rowland has been to kenya many times, but this is his first visit to the slum in nairobi. around 90,000 people live here. medicine is scarce, and there are only 20 basic doctor surgery to treat those with hiv. is the head of the biotech company that does business with medical centers like this one. he knows how urgently the center needs support. the charity called german doctors gives free treatment to 300 patients here every day. many of them are hiv-positive. they used equipment made by his company to test for the virus. he has brought a gift for the medical center -- a mobile testing machine worth 7000 euros. the device will allow doctors to test patients in remote areas. it is solar powered. memo we are a family company. we have been going for 45 years. we can allow ourselves different priorities to companies driven by investors and shareholders. basically, we can make smaller profits, and we have the advantage of making good money in developed countries. that allows us to take on a charity role here. >> as well as testing for hiv, the machine can give information on w